| 1 | package node |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | |
| 7 | "go.uber.org/fx" |
| 8 | ) |
| 9 | |
| 10 | type lcStartStop struct { |
| 11 | fx.In |
| 12 | |
| 13 | LC fx.Lifecycle |
| 14 | } |
| 15 | |
| 16 | // Append wraps a function into a fx.Hook and appends it to the fx.Lifecycle. |
| 17 | func (lcss *lcStartStop) Append(f func() func()) { |
| 18 | // Hooks are guaranteed to run in sequence. If a hook fails to start, its |
| 19 | // OnStop won't be executed. |
| 20 | var stopFunc func() |
| 21 | |
| 22 | lcss.LC.Append(fx.Hook{ |
| 23 | OnStart: func(ctx context.Context) error { |
| 24 | if ctx.Err() != nil { |
| 25 | return nil |
| 26 | } |
| 27 | stopFunc = f() |
| 28 | return nil |
| 29 | }, |
| 30 | OnStop: func(ctx context.Context) error { |
| 31 | if ctx.Err() != nil { |
| 32 | return nil |
| 33 | } |
| 34 | if stopFunc == nil { // Theoretically this shouldn't ever happen |
| 35 | return errors.New("lcStatStop: stopFunc was nil") |
| 36 | } |
| 37 | stopFunc() |
| 38 | return nil |
| 39 | }, |
| 40 | }) |
| 41 | } |
| 42 | |
| 43 | func maybeProvide(opt any, enable bool) fx.Option { |
| 44 | if enable { |
| 45 | return fx.Provide(opt) |
| 46 | } |
| 47 | return fx.Options() |
| 48 | } |
| 49 | |
| 50 | // nolint unused |
| 51 | func maybeInvoke(opt any, enable bool) fx.Option { |
| 52 | if enable { |
| 53 | return fx.Invoke(opt) |
| 54 | } |
| 55 | return fx.Options() |
| 56 | } |